Using a LH Systems ALS50 Light Detection And Ranging (LiDAR) system, 43 flight lines
of standard density (1.4 meter ground sample distance) data were collected over areas
in Orange County, TX (approximately 364 square miles). Multiple returns were recorded
for each laser pulse along with an intensity value for each return. The data acquisition
occurred in 5 missions between June 4, 2006, and June 6, 2006. The data was collected
by Sanborn Mapping Company, Inc. for the Texas Water Development Board (TWDB) and
the Federal Emergency Management Agency (FEMA).